1 / | | x | ------------ dx | 2 | x - 4*x + 8 | / 0
Integral(x/(x^2 - 4*x + 8), (x, 0, 1))
/ | | x | ------------ dx | 2 | x - 4*x + 8 | /
/ 2*x - 4 \ |------------| /2\ | 2 | |-| x \x - 4*x + 8/ \4/ ------------ = -------------- + -------------- 2 2 2 x - 4*x + 8 / x \ |- - + 1| + 1 \ 2 /
/ | | x | ------------ dx | 2 = | x - 4*x + 8 | /
/ | | 1 / | -------------- dx | | 2 | 2*x - 4 | / x \ | ------------ dx | |- - + 1| + 1 | 2 | \ 2 / | x - 4*x + 8 | | / / -------------------- + ------------------ 2 2
/ | | 2*x - 4 | ------------ dx | 2 | x - 4*x + 8 | / ------------------ 2
2 u = x - 4*x
/ | | 1 | ----- du | 8 + u | / log(8 + u) ----------- = ---------- 2 2
/ | | 2*x - 4 | ------------ dx | 2 | x - 4*x + 8 | / 2 \ / log\8 + x - 4*x/ ------------------ = ----------------- 2 2
/ | | 1 | -------------- dx | 2 | / x \ | |- - + 1| + 1 | \ 2 / | / -------------------- 2
x v = 1 - - 2
/ | | 1 | ------ dv | 2 | 1 + v | / atan(v) ------------ = ------- 2 2
/ | | 1 | -------------- dx | 2 | / x \ | |- - + 1| + 1 | \ 2 / | / / x\ -------------------- = atan|-1 + -| 2 \ 2/
/ 2 \ log\8 + x - 4*x/ / x\ C + ----------------- + atan|-1 + -| 2 \ 2/
/ | / 2 \ | x log\8 + x - 4*x/ / x\ | ------------ dx = C + ----------------- + atan|-1 + -| | 2 2 \ 2/ | x - 4*x + 8 | /
log(5) log(8) pi ------ - atan(1/2) - ------ + -- 2 2 4
=
log(5) log(8) pi ------ - atan(1/2) - ------ + -- 2 2 4
log(5)/2 - atan(1/2) - log(8)/2 + pi/4
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.